GOC And Hydrocarbon Flashcards
LNG is termed as…..
Liquified Natural Gas
Petrol diesel and kerosene are obtained by……… of petroleum
Fractional distillation
Coal gas is obtained by…………of coal gas.
destructive distillation
Statement 1: Natural gas is found in upper strata during drilling of oil wells.
Statement 2: Higher hydrocarbons are used as solvents for paints and also as starting materials for manufacture of many dyes and drugs.
Both are correct
Assertion:Alkane were earlier known as paraffins (latin : parum, little; affinis, affinity)
Reason: These hydrocarbons are inert under normal conditions as they do not react with acids, bases and other reagents.
Both are correct and correct explanation
In alkane bond length of C—C is greater than C—H
True
Alkane physical states
C 1 to 4 member gas
C 5 to17 member liq
C 18 and + solids
Petrol and lower fractions of petroleum are also used for dry cleaning of clothes to remove grease stains.
With increase in number of branched chains, the molecule attains the shape of a sphere. This results in smaller area of contact and therefore weak intermolecular forces between spherical molecules, which are overcome at relatively lower temperatures.
Both statements are correct
Incomplete combustion of alkanes with insufficient amount of air or dioxygen, carbon black is formed which is used in the manufacture of ink, printer ink, black pigments and as filters.
True
dodecane, a constituent of kerosene oil on heating to 973K in the presence of platinum, palladium or nickel gives a mixture of
heptane and pentene.
Assertion: rotation around a C-C single bond is not completely free.
Reason: It is hindered by a small energy barrier of 1-20 kJ mol–1 due to weak repulsive interaction between the adjacent bonds.
Both are correct and correct explanation
Assertion: Rotation about carbon-carbon single bond in ethane is almost free for all practical purposes.
Reason: Even at ordinary temperatures, the ethane molecule gains thermal or kinetic energy sufficient enough to overcome this energy barrier of 12.5 kJ mol–1 through intermolecular collisions.
Both are correct and correct explanation
Allene physical state:
First 3 are gases
4 to 14 liquids
Higher solids
Statement 1: Ethene is colourless gas with faint sweet smell
Statement 2; alkene show a regular increase in boiling point with increase in size i.e., every – CH2 group added increases boiling point by 20–30 K.
Both are correct
First stable member of alkyne family is……..
Ethyne aka acetylene
Alkyne physical state
First 3 gas
Next 8 liquids
Higher solids
Statement 1: Ethyene has a characteristic odour
Statement 2: Alkynes are lighter than water
Both are True
Benzene was isolated by……….. in 1825
Michale faraday
During nomenclature for alphabetical order priority initials of prefixes like…./…/… are considered
iso
neo
cyclo
If lone pairs is in conjugation then it is still considered in hybridisation
False
If lone pairs are conjugated in system the lone pair is not considered while calculating the hybridisation
In presence of higher PFG if the carbon of Aldehyde is numbered in chain then use word………. As prefix for aldehyde and if not numbered in chain and treated it whole as separate group attached to ring then use……….
Aldo in chain
Formyl outside chain
Rules for naming cyclo compounds
Priority= PFG > double bond > triple bond > no of carbon atoms
If carbon atoms number same in ring and chain then Ring > Chain
Carbon containing FG is directly attached to ring then they are taken as part of ring and special suffix 2 is used
In benzene derivatives the one with PFG for them the common name is also considered as iupac nomenclature
True
Primary secondary and tertiary amines are treated as different functional groups while it’s not so for alcohols and halides
True
